Results 101 to 110 of about 4,715,495 (301)

Mapping the Outcomes of Stellar Evolution in the Disks of Active Galactic Nuclei

The Astrophysical Journal
The disks of active galactic nuclei (AGNs) are expected to be populated by numerous stars, either formed in the outer regions of the disk via gravitational instability or captured from the nearby nuclear star cluster.
Gaia Fabj, Alexander J. Dittmann, Matteo Cantiello, Rosalba Perna, Johan Samsing   +4 more
doaj   +1 more source

Galactic Center Pulsars with the ngVLA

, 2018
Pulsars in the Galactic Center (GC) are important probes of General Relativity, star formation, stellar dynamics, stellar evolution, and the interstellar medium. Despite years of searching, only a handful of pulsars in the central 0.5 deg are known. The high-frequency sensitivity of ngVLA will open a new window for discovery and characterization of ...
Bower, G., Chatterjee, S., Cordes, J., Demorest, P., Deneva, J., Dexter, J., Kramer, M., Lazio, J., Ransom, S., Shao, L., Wex, N., Wharton, R.   +11 more
openaire   +4 more sources

Elasticity‐Driven Periodic Polarization Patterns in a Chiral Ferroelectric Nematic Fluid

Advanced Materials, EarlyView.
Chiral polar ferroelectric nematic fluids exhibit spontaneous formation of stripe, square, and hexagonal polarization textures under confinement. Controlled by thickness and anchoring, these patterns produce spatially modulated nonlinear optical responses.
Anej Sterle, Peter Medle Rupnik, Luka Cmok, Aitor Erkoreka, Marta Lavrič, Natan Osterman, Calum J. Gibb, Jordan Hobbs, Josu Martinez‐Perdiguero, Richard J. Mandle, Alenka Mertelj, Nerea Sebastián   +11 more
wiley   +1 more source

Multiwavelength Observations of Sgr A*. II. 2019 July 21 and 26

The Astrophysical Journal
We report on the final two days of a multiwavelength campaign of Sgr A* observing in the radio, submillimeter, infrared (IR), and X-ray bands in 2019 July. Sgr A* was remarkably active, showing multiple flaring events across the electromagnetic spectrum.
Joseph M. Michail, Farhad Yusef-Zadeh, Mark Wardle, Devaky Kunneriath, Joseph L. Hora, Howard Bushouse, Giovanni G. Fazio, Sera Markoff, Howard A. Smith   +8 more
doaj   +1 more source

The luminosity of the Galactic center

The Astrophysical Journal, 1992
High signal-to-noise 50- and 90-micron continuum maps of the central 5 x 4 arcmin of the Galaxy made from observations on the Kuiper Airborne Observatory are presented. Dust and luminosity distribution models which are consistent with the data are presented.
J. A. Davidson, M. W. Werner, X. Wu, D. F. Lester, P. M. Harvey, M. Joy, M. Morris   +6 more
openaire   +1 more source

Strong Coupling in Bulk Nanoplasmonic Nanoplatelet Perovskite Scintillators

Advanced Materials, EarlyView.
A bulk scintillating nanocomposite is engineered from CsPbBr3 nanoplatelets and Ag nanocubes to support exciton–plasmon strong coupling under X‐ray excitation. The resulting hybrid polaritonic states appear directly in radioluminescence, opening a route toward polariton‐enabled scintillator design beyond conventional Purcell enhancement.
Michal Makowski, Dominik Kowal, Anna Pniakowska, Kamil Misztal, Mohanad Saadeldin Eid, Joanna Cybinska, Winicjusz Drozdowski, Benoit Mahler, Christophe Dujardin, Detlef Hommel, Liang Jie Wong, Dennis Schaart, Sergio Brovelli, Muhammad Danang Birowosuto   +13 more
wiley   +1 more source

Constraining the Galactic center dark cluster with ELT/MICADO observations

Astronomy & Astrophysics
The Galactic Center hosts the densest known stellar environment in the Milky Way, dominated by the massive black hole Sgr A* and the surrounding nuclear star cluster.
von Fellenberg Sebastiano D., Labaj Matúš, Ressler Sean M.   +2 more
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

Radio and X-ray Emission from the Galactic Black Hole

, 2002
Contents 11 Radio and X-ray Emission from the Galactic Black Hole i Contents ii 11.1 Introduction 1 11.2 Radio Properties of Sgr A* 1 11.2.1 Variability of Sgr A* 1 11.2.2 Size of Sgr A* { VLBI Observations 5 11.2.3 Position of Sgr A* 8 11.2.4 Radio ...
Heino Falcke, Galactic Black Hole
core  

Surrogate‐Optimized Flow‐Guided Miniature Condenser for Rapid Exhaled Glucose Detection

Advanced Materials Technologies, EarlyView.
A surrogate‐optimized miniature condenser guides humid exhaled flow toward cold surfaces to accelerate exhaled breath condensate collection. By improving vapor access within a compact footprint, the design increases sample yield. This enables post‐collection enrichment and rapid colorimetric glucose detection from dilute exhaled biomarkers within a 5 ...
Yiming Thomas Lu, Yamin Mansur, Sai Peri, Jiangyuan Wan, Amio Pronoy Das Ritwik, Emily L. Johnson, Jingcheng Ma   +6 more
wiley   +1 more source